Sandbox

You get two API keys. A live key and a test key.

qk_live_...   production, real money
qk_test_...   sandbox, safe to experiment

How it works

Live and test keys hit the same API but operate on completely separate ledgers. Accounts created with a test key are invisible to the live key. Transfers made in test mode do not affect live balances.

The response header tells you which mode you are in.

X-Quda-Mode: test

What is shared

Your account settings. Rate limits, plan, and webhook subscriptions apply to both modes.

What is separate

Everything else. Ledgers, accounts, transfers, balances. Test mode is a full copy of the API with its own data.

When to use

Use test keys during development and integration testing. Use live keys in production.

You cannot move money between test and live accounts. They exist in different worlds.